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    Wyświetlanie 1-17 z 17
    Tytuł:
    Laboratoryjny reaktor do badania reakcji fotokatalitycznych w układzie ciekłe reagenty - stały katalizator
    Laboratory reactor for testing photocatalyst reactions in the liquid reagents - the solid catalyst system
    Autorzy:
    Słomkiewicz, P. M.
    Szczepanik, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1366431.pdf
    Data publikacji:
    2015
    Wydawca:
    Centralny Ośrodek Badawczo-Rozwojowy Aparatury Badawczej i Dydaktycznej, COBRABiD
    Tematy:
    fotoreaktor
    reakcja fotokatalityczna
    fotokatalizator
    photoreactor
    photocatalyst reactions
    photocatalyst
    Opis:
    W pracy przedstawiono budowę i zasadę działania laboratoryjnego reaktora do badania reakcji fotokatalitycznych w układzie ciekłe reagenty - stały katalizator. Konstrukcja reaktora umożliwia pobieranie próbek z mieszaniny reakcyjnej oraz doprowadzanie do mieszaniny reakcyjnej gazów, w tym gazów obojętnych
    The construction and the principle of operation of the laboratory reactor for testing photocatalyst reactions in the liquid reagents - the solid catalyst system have been described in the presented paper. Construction of reactor enables sampling of the reaction mixture and supplying to the reaction mixture of gases and inert gases too.
    Źródło:
    Aparatura Badawcza i Dydaktyczna; 2015, 20, 1; 24-35
    2392-1765
    Pojawia się w:
    Aparatura Badawcza i Dydaktyczna
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proces fotokatalityczny z udziałem katalizatora immobilizowanego
    Photocatalytic process with participation of immobilized photocatalyst
    Autorzy:
    Ziemiańska, J.
    Baran, W.
    Adamek, E.
    Sobczak, A.
    Lipska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/126291.pdf
    Data publikacji:
    2013
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    fotokataliza
    fotokatalizator
    immobilizacja
    photocatalysis
    photocatalyst
    immobilization
    Opis:
    Coraz większe zanieczyszczenie środowiska sprawia, że poszukiwane są skuteczne metody jego oczyszczania. W tym celu stosowane są różnorodne procesy fizykochemiczne i biologiczne. Jednym ze skutecznych sposobów degradacji szkodliwych związków jest fotokataliza, która należy do metod zaawansowanego utleniania (AOP). Dzięki tej technice dochodzi do rozkładu wielu substancji organicznych, w tym i leków w wyniku utleniania za pomocą generowanych w środowisku reakcji rodników hydroksylowych. Celem pracy było opracowanie efektywnej i zarazem taniej metody usuwania wybranych związków, wykorzystując proces fotokatalityczny. Stąd też został wykorzystany komercyjny katalizator TiO2-P25, immobilizowany na włóknie szklanym. Proces prowadzony był w otwartych reaktorach, które były naświetlane promieniowaniem UV-A. Optymalizację katalizatora prowadzono na podstawie badań fotokatalitycznej dekoloryzacji barwnika Acid Orange 7. W wyniku badań została porównana kinetyka procesów prowadzonych z suspensją i z immobilizowanym katalizatorem. Immobilizacja fotokatalizatora pozwala na znaczne ograniczenie jego zużycia.
    Growing environmental pollution caused that more and more efficient methods of sewage treatment are being developed. Various physicochemical and biological processes are used to achieve that aim. Photocatalysis is one of the most efficient methods of degradation of harmful chemical compounds. It is one of the advanced oxygenation processes (AOP). Thanks to that technique most of the organic compounds, including medicines is degraded as a result of reactions of free hydroxide radicals in the environment. Target of the research was to develop effective and cost efficient method of eradication of selected chemical compounds using photocatalytic process. To achieve that aim, commercial TiO2-P25 catalyst immobilized on fiberglass has been used. Reaction has been conducted in open reactors, which were irradiated with UV radiation. Method has been optimized as a result of studies on dye shade changes of Acid Orange 7 dye using the same method. In the result of studies, kinetics of reactions with suspended and immobilized catalyst were compared. Photocatalytic reaction with immobilization allows for lower catalyst use.
    Źródło:
    Proceedings of ECOpole; 2013, 7, 2; 765-771
    1898-617X
    2084-4557
    Pojawia się w:
    Proceedings of ECOpole
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Proces fotoktalityczny wybranych sulfonamidów w obecności TiO2, FeCl3 i TiO2/FeCl3
    Photocatalytic process of selected sulfonamides in the presence of TiO2, FeCl3 and TiO2/FeCl3
    Autorzy:
    Ziemiańska, J.
    Papla, P.
    Baran, W.
    Adamek, E.
    Sobczak, A.
    Lipska, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/126812.pdf
    Data publikacji:
    2013
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    fotokataliza
    fotokatalizator
    sulfonamidy
    photocatalysis
    photocatalyst
    sulphonamides
    Opis:
    Powszechne stosowanie chemioterapeutyków niesie ze sobą wiele negatywnych skutków. Są one używane w weterynarii, medycynie, hodowli ryb, a także przy uprawie roślin. Sulfonamidy są przykładem takich leków. Są bakteriostatycznymi chemioterapeutykami, które obecnie są głównie stosowane w weterynarii. Gromadząc się w różnorodnych organizmach, często są wobec nich toksyczne. Poszukuje się różnorodnych metod, które mają na celu przeciwdziałanie rosnącemu zanieczyszczeniu środowiska. Jedną ze skutecznych metod jest fotokataliza, która zachodzi przy udziale katalizatora i w obecności promieniowania elektromagnetycznego. Związek organiczny poddany działaniu procesowi fotokatalitycznemu ulega rozkładowi, a następnie całkowitej mineralizacji. Celem pracy było zbadanie skuteczności procesu fotokatalitycznego w obecności wybranych sulfonamidów przy zastosowaniu wybranych układów katalitycznych. Procesy fotokatalityczne badano przy użyciu katalizatora TiO2 P25 Degussa Aeroxide®, FeCl3 oraz mieszaniny TiO2/FeCl3. Fotokataliza zachodziła we wszystkich układach katalitycznych. Stwierdzono, że mieszanina TiO2/FeCl3 jest najbardziej efektywnym układem katalitycznym. Dynamika procesu fotokatalitycznego była charakterystyczna dla reakcji pierwszorzędowych.
    The widespread use of chemotherapeutic carries with it many negative effects. They are used in veterinary, medicine, fish farming and the cultivation of plants. Sulfonamides are an example of such drugs. They are bacteriostatic chemotherapeutics, which are now mainly used in veterinary medicine. Cumulating at a variety of organisms, are often toxic to them. Aim is to find a variety of methods which prevent the increasing environmental pollution. One of the most effective methods is photocatalysis, which occurs with the participation of the catalyst in the presence of electromagnetic radiation. Organic compound subjected to photocatalysis is degraded, then undergoes the total mineralization. The aim of this study was to examine the effectiveness of the process of photocatalysis in the presence of selected sulfonamides using the selected catalytic systems. Photocatalytic processes have been studied using the catalyst TiO2-P25 Degussa Aeroxide®, and a mixture of FeCl3 and TiO2/FeCl3. Photocatalysis occurred in all the catalytic systems. It was found that the mixture TiO2/FeCl3 is the most efficient catalytic system. The dynamics of the process of photocatalytic reaction was typical for the first order reaction.
    Źródło:
    Proceedings of ECOpole; 2013, 7, 1; 427-434
    1898-617X
    2084-4557
    Pojawia się w:
    Proceedings of ECOpole
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fixed Bed System Packed with Porous Materials for Removal of Organic Dye from Wastewater
    Autorzy:
    Cho, Young-Sang
    Sung, Sohyeon
    Powiązania:
    https://bibliotekanauki.pl/articles/2203706.pdf
    Data publikacji:
    2023
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    porous particles
    photocatalyst
    adsorbent
    fixed bed
    Opis:
    Fixed beds were adopted for removal of organic dye from water by photocatalytic decomposition or adsorption. To this end, macroporous titania or silica micro-particles were synthesized from emulsions as micro-reactors and packed in the bed. During feeding aqueous methylene blue solution, UV light was irradiated for generation of active radicals for removal of dye by photocatalytic decomposition. Porous silica particles were also used as adsorbents in the bed for continuous adsorption of organic dye. For regeneration of the porous titania or silica particles, rinsing with fresh water was carried out before repeated cycles.
    Źródło:
    Archives of Metallurgy and Materials; 2023, 68, 1; 51--56
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    UV–Light assisted photocatalytic activity of Activated charcoal-TiO2 nanomaterial
    Autorzy:
    Kamalakkannan, J.
    Balraj, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/1112779.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Activated charcoal-TiO2
    RB 5 dye
    photocatalyst
    Opis:
    An activated charcoal-TiO2 Catalyst was synthesized via the precipitation method and sonication technique, and three dyes: Reactive Black 5 (RB 5), Rhodamine B (Rh B) and Napthol Blue Black (NBB) were used to assess the quality of the product under UV-Light. The nanomaterial was also characterized by High-resolution scanning electron microscopy (HR-SEM), elementary dispersive X-ray (EDX), photoluminescence spectroscopy (PL) and UV-Vis DRS. The photodegradation of the three dyes when exposed to this nanomaterial indicate the superior photocatalytic activity of RB 5 as compared to the other dyes. A mechanism is proposed for the higher activity of AC-TiO2 than that of TiO2 nanocomposite material. Overall, this nanocomposite material was found to be highly stable and reusable. The nanomaterial is also economically of very low cost.
    Źródło:
    World News of Natural Sciences; 2018, 17; 102-110
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Processing of Palm Mill Oil Effluent Using Photocatalytic: A Literature Review
    Autorzy:
    Agustina, Lya
    Suprihatin, -
    Romli, Muhammad
    Suryadarma, Prayoga
    Powiązania:
    https://bibliotekanauki.pl/articles/2028038.pdf
    Data publikacji:
    2021
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    POME
    POMSE
    photocatalytic
    photoreactor design
    synthesis of photocatalyst
    Opis:
    The extraction of palm oil fruit (E. guineensis) is achieved by a combination of methods such as pressing, sterilizing, digesting, peeling, grading, purifying, and vacuum drying the extracted oil. This process requires excessive use of water and produces a large amount of wastewater with a high concentration of pollutants, called palm oil mill efluent (POME). This waste water is a high-viscosity liquid with a brown color and a temperature of 80–90 °C. It has a very low pH value, between 4.2–4.5, has a high chemical and biochemical oxygen demand, and is extremely toxic. POME treatment has adopted a variety of methods and technologies, including coagulation-flocculation, anaerobic-aerobic treatment and membrane technology. Biological treatment is mainly used to treat POME, and the POME treated through biological treatment is called palm oil mill secondary effluent (POMSE). Unfortunately, the treated wastewater still contains high concentrations of organic matter. The color of the effluent is still dark brown. The remaining pollutants from this biological process are generally difficult to degrade biologically, thus requiring suitable processing methods for its removal, so that it can be discharged to the environment safely or even reused orrecycled. One of the challenging processing methods is photocatalytic process. This method is able to utilize abundant resources in the form of sunlight, and is also effective to degrade a wide variety of recalcitrant organic pollutants in the wastewater. This paper presents the current research and development of photocatalytic degradation process for processing of palm oil mill secndary effluent. The review and analysis are focused on synthesis of photocatalyst and the photoreactor design. Based on the results of the literature review and analysis, some recommendations are formulated for future research for their application in advanced POMSE management so that it can be reused for various purposes.
    Źródło:
    Journal of Ecological Engineering; 2021, 22, 11; 43-52
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Facile Synthesis and Characterization of Novel CdS/BiOI Heterojunctions with Enhanced Visible-Light Photocatalytic Performances
    Autorzy:
    Fang, Shanshan
    Lu, Min
    Zhou, Man
    Li, Zhongyu
    Xu, Song
    Peng, Yanyan
    Li, Qinchi
    Lu, Dayong
    Powiązania:
    https://bibliotekanauki.pl/articles/1030343.pdf
    Data publikacji:
    2017-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    CdS/BiOI heterojunctions
    visible-light photocatalyst
    photocatalytic activity
    nanocomposites
    Opis:
    Novel CdS/BiOI heterojunction photocatalysts were successfully prepared by facile method. The as-prepared samples were characterized by transmission electron microscopy, field-emission scanning electron microscopy, X-ray diffraction, the Raman spectroscopy, UV-vis diffuse reflectance spectra, the Fourier transform infrared spectra, and photoluminescence. It was found that CdS nanoparticles were uniformly distributed on the surface of BiOI microspheres. The photodegradation tests showed that the photocatalytic efficiency was increased at first and then decreased when further increasing CdS content in the nanocomposites. The highest activity was obtained by 3%-CdS/BiOI nanocomposites. The enhanced photocatalytic performances were attributed to the matched band potentials of CdS and BiOI, which resulted in the efficient separation of photogenerated electron-hole pairs. Based on the experimental results, a reasonable photocatalytic mechanism of CdS/BiOI photocatalysts was also proposed.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 2; 263-270
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Hydrothermal fabrication of CeVO4 nanoflowers assisted effective photocatalytic mineralization of aqueous methylene blue solution
    Autorzy:
    Muthuvel, I.
    Jayasri, U.
    Gowthami, K.
    Kumar, N. Dinesh
    Thirunarayanan, G.
    Balakrishnan, K.
    Rajachandrasekar, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/1031461.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    CeVO4
    Cerium vanadate
    Methylene Blue
    Photocatalyst
    Wastewater treatment
    Opis:
    A tetragonal zircon type cerium vanadate (CeVO4) photocatalyst was successfully synthesized hydrothermal method using Ce(NH4)2(NO3)6 and NH4VO3. The products were characterized using the FT-IR, XRD, FE-SEM and UV-DRS. The XRD results show that crystallite size of cerium vanadate is 27.2 nm. The effect of operational parameters such as effect of pH, catalyst suspension, initial dye concentration and reusability were observed. Hence the catalyst can be reused for continuous treatment of wastewater.
    Źródło:
    World Scientific News; 2020, 142; 103-119
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Novel (Ag,Y) doped TiO2 plasmonic photocatalyst with enhanced photocatalytic activity under visible light
    Autorzy:
    Kallel, Wannes
    Chaabene, Sirine
    Bouattour, Soraa
    Powiązania:
    https://bibliotekanauki.pl/articles/110853.pdf
    Data publikacji:
    2019
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    titanium dioxide
    XRD
    plasmonic photocatalyst
    Methylene Blue
    visible light
    Opis:
    Nano-sized Y- Ag doped and co-doped TiO2 particles were synthesized using the sol–gel method and Ti(OBu)4 as TiO2 precursor. Their structural and optical properties were examined by scanning electron microscopy (SEM), XRD, thermogravimetric-differential thermal analysis (TG-DTA), FT-IR and UV-vis absorption spectroscopies. The photocatalytic activity of these materials was investigated for the photodegradation of methylene blue (MB) as a model reaction under visible light irradiation. Ground state diffuse reflectance absorption studies reveal that both Y and Ag dopant cause deviations of the band gap to higher energies attesting that co-doping the TiO2 with Y and Ag could enhance the photocatalytic activity by delaying the electron–hole recombination by means of higher energy band gaps. Co-doping TiO2 at a level of 4% (Y, Ag) samples leads to a significant decrease in the crystallite size of photocatalyst and containing both anatase and Ag/AgCl components. However, the high photocatalytic performance is attributed to an efficient electron-hole pairs separation at the photocatalyst interfaces in addition to localized surface plasmon resonance of Ag particles. The development of these visible light- activated nanocatalysts has the potential of providing environmentally benign routes for water treatment.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2019, 55, 3; 745-759
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation, characterization of a ceria loaded carbon nanotubes nanocomposites photocatalyst and degradation of azo dye Acid Orange 7
    Autorzy:
    Wen, T.
    Tang, Y.-B.
    Mo, B.-Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/204686.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Carbon nanotubes
    ceria
    nanocomposites photocatalyst
    preparation
    acid orange 7
    Opis:
    A ceria loaded carbon nanotubes (CeO2/CNTs) nanocomposites photocatalyst was prepared by chemical precipitation, and the preparation conditions were optimized using an orthogonal experiment method. HR-TEM, XRD, UV-Vis/DRS, TGA and XPS were used to characterize the photocatalyst. Nitrogen adsorption-desorption was employed to determine the BET specifi c surface area. The results indicated that the photocatalyst has no obvious impurities. CeO2 was dispersed on the carbon nanotubes with a good loading effect and high loading effi ciency without agglomeration. The catalyst exhibits a strong ability to absorb light in the ultraviolet region and some ability to absorb light in the visible light region. The CeO2/CNTs nanocomposites photocatalyst was used to degrade azo dye Acid Orange 7 (40 mg/L). The optical decolorization rate was 66.58% after xenon lamp irradiation for 4 h, which is better than that of commercial CeO2 (43.13%). The results suggested that CeO2 loading on CNTs not only enhanced the optical decolorization rate but also accelerated the separation of CeO2/CNTs and water.
    Źródło:
    Archives of Environmental Protection; 2016, 42, 2; 12-19
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Photodegradation of organic compounds in water
    Autorzy:
    Brodzik, K.
    Walendziewski, J.
    Stolarski, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/778174.pdf
    Data publikacji:
    2007
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fotodegradacja
    fotokatalizator
    aerożele tytanowo-krzemowe
    photodegradation
    photocatalyst
    titania-silica aerogels
    aerogels
    Opis:
    The application of photocatalytic processes for the decontamination treatment of polluted water has inspired very extensive studies. Titanium dioxide with its large band gap energy and appropriate redox potential was found as one of the most promising semiconductors for the photodegradation of pollutants in the water as well as in gas phase. The titania-silica aerogels obtained by a simple co-hydrolysis method was applied in the photodegradation of the model organic compound. Different ageing times and heat treatment temperatures were found to influence both the activity and the textural properties of the photocatalysts. The obtained aerogels are efficient photodegradation catalysts of methylene blue and allow a removal up to 98 and 78% of the model pollutant from 20 and 500 ppm solutions, respectively.
    Źródło:
    Polish Journal of Chemical Technology; 2007, 9, 3; 130-133
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation, Characterization, and Application of N,S-codoped TiO2/Montmorillonite Nanocomposite for the Photocatalytic Degradation of Ciprofloxacin: Optimization by Response Surface Methodology
    Autorzy:
    Massoudinejad, M.
    Paseban, A.
    Yazdanbakhsh, A.
    Nabid, M. R.
    Powiązania:
    https://bibliotekanauki.pl/articles/779063.pdf
    Data publikacji:
    2018
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    N,S-codoped TiO2/Montmorillonite
    nanocomposite
    Ciprofloxacin
    simulated sunlight
    photocatalyst
    Opis:
    An N,S-codoped TiO2/Montmorillonite nanocomposite, as a photocatalyst, was synthesized in the sol-gel method and used for the degradation of ciprofloxacin (Cip) in an aqueous solution. N,S-codoped TiO2/Montmorillonte was characterized by powder X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), field emission scanning electron microscopy (FESEM), transmission electron microscope (TEM), and X-ray fluorescence (XRF) analyzes. A central composite design (CCD) was used to optimize the variables for the removal of Cip by the N,S-codoped TiO2/Montmorillonite. A maximum decomposition of 92% of Cip was achieved in optimum conditions. The band gap value for the nanocomposite was 2.77 eV. Moreover, with the use of nanocomposite in the four consecutive runs, the final removal efficiency was 66%. The results show that the N,S-codoped TiO2/ Montmorillonite under simulated sunlight irradiation can be applied as an effective photocatalyst for the removal of Cip from aqueous solutions.
    Źródło:
    Polish Journal of Chemical Technology; 2018, 20, 4; 66-74
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ability of Response Surface Methodology to Optimize Photocatalytic Degradation of Amoxicillin from Aqueous Solutions Using Immobilized TiO2/Sand
    Autorzy:
    Sulaiman, Fadia A.
    Alwared, Abeer I.
    Powiązania:
    https://bibliotekanauki.pl/articles/2086434.pdf
    Data publikacji:
    2022
    Wydawca:
    Polskie Towarzystwo Inżynierii Ekologicznej
    Tematy:
    amoxicillin
    solar photocatalyst
    immobilized TiO2
    sand
    RSM
    response surface methodology
    kinetics
    Opis:
    The response surface method was applied to optimize operational factors in the solar photocatalytic process on the removal of Amoxicillin (AMOX) residues from aqueous solution using TiO2 immobilized on the sand as a catalyst. The results reveal that the degradation percentage of AMOX is 93.12%, when optimal conditions of pH=5, 75 mg/l of TiO2, 400 mg/l of H2O2, and 10 mg/l of AMOX concentration at 150 min irradiation time were used. Furthermore, the model’s expected response results have reasonable similarity with the actual data (R2 = 93.58%), demonstrating the efficiency of this method in making an accurate prediction. A second-order polynomial multiple regression model was used to evaluate the responses, which confirms that was a satisfactory adjustment with the achieved data through analysis of variance (R2 = 93.58%, R2adj = 91.48% and R2pred =89.68%). In addition, it is observed that the removal of undesirable compounds follows a pseudo-2nd order kinetic model with R2 = 0.9862. In conclusion, with the ease of usage of immobilized TiO2 and good photocatalytic efficiency, the findings showed the potential application to the antibiotics from an aqueous solution.
    Źródło:
    Journal of Ecological Engineering; 2022, 23, 5; 293--304
    2299-8993
    Pojawia się w:
    Journal of Ecological Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Synthesis of an optical catalyst for cracking contaminating dyes in the wastewater of factories using indium oxide in nanometer and usage in agriculture
    Autorzy:
    Ahmed, Ishaq F. E.
    El-Shenawy, Ahmed I.
    Refat, Moamen S.
    Powiązania:
    https://bibliotekanauki.pl/articles/778735.pdf
    Data publikacji:
    2019
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Photocatalyst
    In2O3
    precursors
    Crystal Violet
    Congo Red
    NPs
    Opis:
    Herein, the photocatalytic degradation of the Congo Red (CR) and Crystal Violet (CV) dyes in an aqueous solution were discussed in the presence of an indium(III) oxide (In2O3) as optical catalyst efficiency. The caproate bidentate indium(III) precursor complex has been synthesized and well interpreted by elemental analysis, molar conductivity, Fourier transform infrared (FT-IR), UV-Vis, and thermogravimetric (TGA) with its differential thermogravimetric (DTG) studies. The microanalytical and spectroscopic assignments suggested that the associated of mononuclear complex with 1:3 molar ratio (M3+:ligand). Octahedral structure is speculated for this parent complex of the caproate anion, CH3(CH2)4COO− ligand. The In2O3  NPs with nanoscale range within 10–20 nm was synthesized by a simple, low cost and eco-friendly method using indium(III) caproate complex. Indium oxide nanoparticles were formed after calcination of precursor in static air at 600°C for 3 hrs. The structural, grain size, morphological and decolorization efficiency of the synthesized NPs were characterized using the FT-IR, X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX) and transmission electron microscopy (TEM) analyses. It was worthy mentioned that the prepared In2O3  NPs showed a good photodegradation properties against CR and CV organic dyes during 90 min.
    Źródło:
    Polish Journal of Chemical Technology; 2019, 21, 4; 98-105
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fotokatalizatory hybrydowe z matrycą TiO2 aktywowaną ftalocyjaninami lantanowców
    Hybrid photocatalysts with a TiO2 matrix sensitized with lanthanide phthalocyanines
    Autorzy:
    Słota, R.
    Dyrda, G.
    Galbas, M.
    Mele, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/142009.pdf
    Data publikacji:
    2014
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
    Tematy:
    ftalocyjaniny
    ditlenek tytanu (anataz)
    fotooksydacja
    fotokatalizator
    phthalocyanines
    titanium dioxide (anatase)
    photooxidation
    photocatalyst
    Opis:
    Przedstawiono wyniki badań aktywności nowego typu fotokatalizatorów hybrydowych z matrycą TiO2 (anataz) impregnowaną diftalocyjaninami lantanowców (LnPc2), w procesie fotoutleniania 4-nitrofenolu w fazie wodnej. Stwierdzono, że w obecności odpowiedniego sensybilizatora ftalocyjaninowego szybkość degradacji 4-NP może zwiększyć się nawet 4-krotnie w porównaniu z czystym anatazem. Najbardziej efektywne były układy zawierające kompleksy Gd i Ho.
    Research results on the activity of novel hybrid photocatalysts with a TiO2 (anatase) matrix impregnated with lanthanide diphthalocyanines (LnPc2) in photooxidation of 4-nitrophenol in the water phase have been reported. It was found that in presence of an appropriate phthalocyanine sensitizer the degradation rate of 4-NP might have increased even four-fold, as compared to bareanatase. Systems containing complexes of Gd and Ho were the most effective ones.
    Źródło:
    Chemik; 2014, 68, 4; 385-390
    0009-2886
    Pojawia się w:
    Chemik
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Design of UVA-LED concentric glass tube microreactor and evaluation of photocatalysis with simultaneous adsorption and hydrodynamic cavitation for fluorescent dye degradation
    Autorzy:
    Sundar, Kaviya Piriyah
    Kanmani, Sellappa
    Powiązania:
    https://bibliotekanauki.pl/articles/2057614.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    hydrodynamic cavitation
    photocatalytic reactor
    fluorescence dye
    photocatalyst
    kawitacja hydrodynamiczna
    reaktor fotokatalityczny
    barwnik fluorescencyjny
    fotokataliza
    Opis:
    A slurry UVA-LED concentric glass tube reactor (CGTR) with micro-depthof 2 mm was designed for plug flow behaviour (length/effective diameter = 150). The reactor design considered uniform radial concentration and hydrodynamic cavitation. The 100% Acridine Orange dye (3.77×10-5 M) was removed within 35 min at the graphene oxide dose of 0.3 g/dm3 and initial pH 11. It was observed that hydrodynamic cavitation shortened the reaction time and enhanced the apparent reaction rate constant from 0.022 to 0.109 min-1. Further, the degradation pathway showed that decolourized dye solution consisted of ethylenedione (34%), indicating the oxidative reaction occurred.
    Źródło:
    Environment Protection Engineering; 2022, 48, 1; 5--22
    0324-8828
    Pojawia się w:
    Environment Protection Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dye decomposition on P25 with enhanced adsorptivity
    Autorzy:
    Janus, M.
    Wawrzyniak, B.
    Tryba, B.
    Morawski, A.W.
    Powiązania:
    https://bibliotekanauki.pl/articles/779704.pdf
    Data publikacji:
    2008
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    fotokatalizator
    N-domieszkowanie
    dwutlenek tytanu
    barwnik azowy
    visible-light active photocatalyst
    N-doped
    titanium dioxide
    azo dye
    Opis:
    The preparation method and the activity of the TiO2-P25/N doped photocatalyst based on commercial titanium dioxide (TiO2 AeroxideŽ P-25 Degussa, Germany) are presented. For the TiO2-P25/N preparation TiO2-P25 and gaseous ammonia were kept in a pressure reactor (10 bars) for 4 hours at the temperature of 200°C. This modification process changed the chemical structure of the TiO2 surface. The formation of NH4+ groups was confirmed by the FTIR measurements. Two bands in the range of ca. 1430 - 1440 cm-1 attributed to bending vibrations of NH4+ could be observed on the FTIR spectra of the catalysts modified with ammonia and the band attributed to the hydroxyl groups at 3300 - 3500 cm-1, which were not reduced after N-doping. The photocatalytic activity of the photocatalysts was checked through the decomposition of two dyes under visible light irradiation. The modified TiO2 thus prepared samples were more active than TiO2-P25 for the decomposition of dyes under visible light irradiation.
    Źródło:
    Polish Journal of Chemical Technology; 2008, 10, 2; 11-16
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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